Minor doc updates, fixes and improvements

In particular, removed code which no longer worked, made light
theme easier on the eyes, added slight syntax highlightning,
and fixed search for exact matches.

telethon_generator/data/html/js/search.js

@@ -85,8 +85,8 @@ if (typeof prependPath !== 'undefined') {
 // Returns the penalty for finding the needle in the haystack
 // or -1 if the needle wasn't found at all.
 function find(haystack, needle) {
-    if (needle.length == 0) {
-        return true;
+    if (haystack.indexOf(needle) != -1) {
+        return 0;
     }
     var hi = 0;
     var ni = 0;